Amphastar Pharmaceuticals, Inc. · NASDAQ:AMPH
Amphastar Pharmaceuticals, Inc. shareholders
As of Jun 30, 2026, 204 institutions reported holding Amphastar Pharmaceuticals, Inc., 66.6% of its shares. Largest: BlackRock, Vanguard and Dimensional. New holders, exits, insiders and big stakes, each with its filing.
| Holder | Shares | % of Amphastar Pharmaceuticals, Inc. | Change | Filed |
|---|---|---|---|---|
| BlackRock | 5.22M | 12.3% | −196K | Aug 7, 2026 |
| Vanguard | 2.64M | 6.2% | −9,041 | Aug 13, 2026 |
| Dimensional | 2.31M | 5.4% | +277K | Aug 11, 2026 |
| State Street | 1.64M | 3.9% | +34,611 | Aug 7, 2026 |
| American Century | 1.18M | 2.8% | +159K | Aug 12, 2026 |
| Marshall Wace, LLP | 1.07M | 2.5% | +40,682 | Aug 13, 2026 |
| Geode Capital | 970K | 2.3% | −6,810 | Aug 12, 2026 |
| Fuller & Thaler Asset Management, Inc. | 949K | 2.2% | −446K | Aug 12, 2026 |
| D. E. Shaw & Co., Inc. | 887K | 2.1% | +222K | Aug 14, 2026 |
| Lsv Asset Management | 642K | 1.5% | −9,700 | Aug 6, 2026 |